Questions tagged [wgs84]

WGS84 is a geodetic coordinate system, the World Geodetic System 1984 (EPSG:4326).

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Loading NAD83 and WGS84 layers together in QGIS?

I have downloaded parcel files for several counties in Washington State, and am attempting to overlay them on the OpenStreetMap Standard base layer (which is in WGS84 Pseudo Mercator). The majority of ...
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191 views

Convertion of Geotiff from EU-DEM EPSG:3035 - ETRS89 / ETRS-LAEA to WGS84

I have downloaded elevation data from EU-DEM My background is in software engineering and my GIS skills are limited. How can I convert the aforementioned geotiff to WGS84 format geotiff with lon/lat ...
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134 views

QGIS 3.0 is showing a point's coordinates in the original spatial reference system instead of the project's spatial reference system

I obtained GPS coordinates of a point to within a couple centimeter accuracy using RTK GPS in the NAD83 Spatial Reference System. This information is included in the QGIS layer file metadata, and the ...
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86 views

Project raster tool stays white at iteration in ModelBuilder?

I want to project a bunch of rasters (WGS84) to different UTM (WGS84) coordinate systems. The coordinate system depends on a field value of a point shape. So on each raster lays a point with its ...
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164 views

Getting relative XY coordinates

EDITED I started a project with CRS WGS 84 /Pseudo Mercator and I created a shapefile including point features in different locations around the globe. I have been already working on that for a while ...
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27 views

Vector CRS change 'extents too large'

Just trying to update an old project but for some reason it was set up in EPSG:4326, WGS 84. I have no idea what base maps were originally used to create it as they are no longer on the system, and ...
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74 views

Extract lat/long from GeoTIFF with Mercator CRS

I have a GeoTIFF file and with gdalinfo command I found the following info: Size is 1200, 1400 Coordinate System is: PROJCS["unnamed", GEOGCS["WGS 84", DATUM["WGS_1984", ...
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363 views

Reprojecting EPSG:3412 to EPSG:4326 using GDAL?

I want to reproject "South polar stereographic" projection to "gcs WGS 84". I have tried the solution given to Re-projecting from Polar projection to EPSG:4326? through this commands I am getting ...
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42 views

Can percent overlap of polygon layers be calculated in geographic coordinate system? [duplicate]

I have two global polygon shapefiles in WGS84, and I would like to generate spatial stats on the % area of one shapefile that is overlapping the other. I understand that geometric calculations such as ...
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2answers
183 views

Looping Projection in ArcGIS ModelBuilder?

I've got a global DEM raster dataset in WGS84 and need to project this to all WGS84 UTM Zones. So after that I should have 120 raster, one in each Zone. Is there a possibility to automate this ...
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224 views

Finding GPS coordinates of point located between 2 known meridians?

I need to solve this task. How to find GPS coordinates of a point which is 1029.96033 km from prime meridian and 747.67936 km from 25th meridian, using WGS84 standard. It is a particular task but I ...
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37 views

Error in projection or just a graphical error?

I've got a worldwide SRTM grid in WGS84 and want to reproject it to UTM coordinates. If I do so in parts of the world are strange tiles of the map (especially in Eurasia), which are not part of the ...
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341 views

How to map using more 'accurate' DATUM than WGS84? [closed]

WGS 84 is not very accurate as it is a compromise for the whole earth. Assuming theoretically I'm surveying using very accurate IMU and very accurate GPS (in WGS 84 of course). I think I'll get a ...
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1answer
2k views

How to convert resolution in degrees to resolution in meters?

I have a raster data with spatial reference GCS-WGS-1984 (datum D-WGS-1984). Its cell size is mentioned as (0.00045, 0.00045) in degrees. How can I convert this resolution in meters (i.e. linear unit)?...
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158 views

Tranform geometry to WGS 84

I need to transform some line and polygon geometry to WGS 84. At point it working fine, but at the line and polygone I have problems, I tried in many ways, but it does not work. In the screenshot you ...
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423 views

Transforming from NGVD29 to EGM96/WGS84?

I have this USGS reservoir elevation in NGVD29 datum and I want to transform it to WGS84 ellipsoid (SRTM 1 ArcSec DEM). How can I transform this point data (NGVD29) to EGM 96 or WGS84 ellipsoid so ...
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Generating polygon representing rough 100km circle around latitude/longitude point using Python?

Given a latitude/longitude point anywhere on earth, I would like to assemble a polygon that roughly resembles a circle with a 100km radius around that point. It doesn't have to be pin-point accurate, ...
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Complete map of Oceania (physical, from satellite,…) to use as background [duplicate]

I need to use a map to show a cartographic output based on raster elaborations. Specifically, I want to use this map as background to overlay over it some cells of my rasters layers. The type of map ...
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456 views

Converting coordinates from GCS_WGS_84 Linear_Meter to lat/long?

I have a LiDAR .laz file with points from Toulouse (France). I convert this file to a .las file using LAStools's las2las function. Then, using lasinfo on this .las file gives me some information, ...
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42 views

Converting raster from WGS_1984_plate_carree to WGS_1984 in ArcGIS Desktop?

I am a beginner using ArcGIS and I downloaded a TIFF which is in WGS_1984_plate_carree coordinate system. This image covers all the world and in this coordinate system the extent goes from -180 (left)...
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2answers
282 views

Lat/Lon to UTM conversion across multiple zones

I have a data set that represents the extents of 1:25000 map sheets over a whole state. Its stored in PostGIS in WGS84 lat/lon. Id like to retrieve the MinX, MaxX, MinY and MaxY for the bounding box ...
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173 views

DistanceOp.nearestPoints wrong result? [closed]

in order to compute distance in WGS84 geometries, I first call DistanceOp.nearestPoints(g1, g2) from JTS 1.13 to compute the nearest points of this geometries, where: g1 = LINESTRING (14.796 47.9467, ...
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427 views

Converting elevation from EU-DEM (ETRS89) to WGS84

I'm having a hard time trying to use elevation data from EU-DEM. This data is in ETRS89 (EPSG:4258), according to their site. Now, when I extract the elevation for a shore, I get 0 meters of ...
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2k views

What is Different Between X,Y and Latitude,Longitude or Meters

According to ESRI "To add a table of x,y coordinates to your map, the table must contain two fields: one for the x-coordinate and one for the y-coordinate. The values in the fields may ...
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134 views

Parametric equation with latitude and longitude

I have an arc described by three points: arc center, starting point, ending point. In order to calculate intermediate points of the arc, I would normally use the parametrized equation. x(t) = x(...
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1answer
424 views

Bessel_1841 to Mercator in Python

Despite similar Q&As I can't seem to get my answer. So I have this set of coordinate (124616.1535508, 486555.4631204) are mapped to the Bessel_1841 coordinate space. I'd like to transform these ...
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1answer
2k views

Convert coordinates from WGS84 to Gauss-Krüger Zone

I m currently trying to convert coordinates which come in a csv file in Lon/Lat to Gauss Krüger (Zone 4) using R. My script works perfectly fine, except that the resulting shapefile with the converted ...
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105 views

How to create a csv with lat long coordinates from a WGS84 layer with Grass

This question seems trivial but I'm having trouble doing this simple task. I'm working on a WGS84 location in Grass 6.4 and I'm trying to convert a raster layer in a csv with lat long coordinates ...
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1answer
135 views

Is there a common way of notating which revision of WGS84 is being used?

In requirements/specifications if WGS84 is indicated, is there a standard way to determine which revision of WGS84 is being referenced? For example, while WGS84 was developed in 1984, the latest ...
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303 views

Converting from Eastings and Northings on British Ordnance Survey to WSG84

I am a software developer currently working on a project that relies heavily upon knowing if our position is within a defined region - specified as a polygon using a set of points to define a linear ...
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220 views

Spatial reference conflict: WGS84 or clrk66

For a raster dataset, trying my.raster@crs or proj4string(my.raster) in R gives the PROJ.4 string "+proj=longlat +ellps=clrk66 +no_defs". I downloaded the raster from SEDAC here - the World link, ...
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70 views

Why does Lat/Long differ depending on the coordinate system of the data?

I obtained ETRS89 (ETRS_1989_ETRS-TM32;WKID: 3044 Authority: EPSG) data and I am using a Gauss-Krüger coordinate system (DHDN_3_Degree_Gauss_Zone_3;WKID: 31467 Authority: EPSG). Now I need to ...
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1answer
118 views

Georeference a binary grid file?

I currently have X amount of binary files that are in grid format. I have the span of these files in the form of latitude/longitude, plus the geographic projection. How can I turn these into ...
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2answers
160 views

Any idea why my data is off by 5ft?

I have a shapefile of survey control points (WGS 84) from the public domain provided by my local municipality. I'm using a GeoXH with a zephyr antenna. I have my coordinate system set to WGS 1984. ...
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1answer
1k views

Calculate percentage overlap of polygons in WGS84

I'd like to calculate the percentage of overlap (not area) of polygons in two different layers. Both layers are in WGS84 (EPS:4326). There are several tutorials on how to calculate area overlap for ...
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290 views

Conversion problem from Lambert93 to WGS84 - R

I am dealing with IGN shapefiles of french "communes" that are in Lambert93 projection. temp <- readOGR(dsn = chemin) temp@proj4string which gives CRS arguments: +proj=lcc +lat_1=44 +lat_2=...
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1k views

Gauss Kruger to WGS84

I have to transform Gauss Kruger coordinates to WGS84 in my software application. I'm using the Java library of PROJ4 to do that. For Gauss Kruger, I always use EPSG:31466 and for WGS84 EPSG:4326. ...
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1answer
984 views

Converting EPSG 32639 to WGS 84 using Proj.Net gives wrong coordinates

I've used Proj.Net in my c# application to convert from UTM 39N to WGS 84 as below: private const string wkt32639 ="PROJCS[\"WGS 84 / UTM zone 39N\",GEOGCS[\"WGS 84\",DATUM[\"WGS_1984\",SPHEROID[\"...
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1answer
59 views

Features in projection are tiny

In QGIS 2.18.7 I want to change the projection of my shapefiles into a form that preserves distances for the sake of analysis. But when I do this from WGS84 to "WGS84 UTM zone 48N" or "south asia ...
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111 views

WGS84 to EPSG:20007, Pulkovo 1995/ Gauss Kruger zone 7

I have a shapefile drawn in Selected CRS EPSG 84, when I try to load it in my project in Pulkovo 1995/ Gauss Kruger zone 7, its missplaced, and when i change shapefiles crs in properties, still no ...
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What WGS84 epoch date is used by Google Maps

I have some Nad83 data that I want to overlay on Google Maps. This article by ngs.noaa.gov explains translating from nad83 to wgs84 better than anything I have read. If I were to use a tool like the ...
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Converting 9319106.045445956 in unknown coordinate system to WGS84? [duplicate]

From some API I'm receiving latlng coordinates in a stranger format: x: 9319106.045445956, y: 7020308.253131529, I don't know what it is, but my map module works only with WGS84 coordinates: lat: 53....
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477 views

Why are conversion results from proj.4 inaccurate?

I want to convert a Gauss-Kruger coordinate (EPSG::31467) into a WGS84 coordinate (EPSG::4326) using proj.4. The problem is that the output from proj.4 is very, very inaccurate. Consider the Gauss-...
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1answer
948 views

Applying the Bursa-Wolf transformation

I want to transform Gauss-Kruger coordinates into WGS84 coordinates by applying the Bursa-Wolf transformation. I know the Bursa-Wolf parameters for the desired transformation. What confuses me is that ...
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2answers
1k views

Why does WGS84 refer to so many different things?

Sounds like a stupid question, but I've been struggling with this. Here's a diagram of the structure for EPSG 4326 - the geographic CRS known as WGS 84. Here we have WGS 84 (a CRS), World ...
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1answer
392 views

How to get square metric pixels for a GeoTiff, whose pixel spacing is given in degree?

I have received a GeoTiff file, whose pixel spacing is provided in degree (e.g. +1° to the right, -1° down). Of course, this means that the actual, metric pixel spacing changes in relation to the ...
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2answers
646 views

Georeferencer QGIS not working?

I am trying to georeference a .png file. After inserting all the data I get the following error "Transform Failed: Failed to compute GCP transform: Transform is not solvable." What can be the ...
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1answer
371 views

Converting long, lat to tile of NASA GIBS - WGS 84 / Lat-lon / Geographic (EPSG:4326)?

I'm following GIBS API for Developers and I need to convert long, lat of POI to col and row of tile for given zoom. For example to get right tile in endpoint like: https://gibs.earthdata.nasa.gov/...
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150 views

Geographic Transformation in Alaska Between NAD83 (NSRS 2007) and WGS84

This is a related question to this one asked ~3 years ago: Geographic Transformations in Alaska Between NAD83 and WGS84 We are currently on ArcGIS Desktop 10.4.1 What is the best geographic ...
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107 views

Calculating imprecision introduced by using WGS 84 coordinates as x,y in raster?

I have several coordinates provided in WGS 84 which I need to rasterize. For that purpose I simply interpret the lat,lon coordinates as x,y coordinates and I apply some scaling. So e.g. anything in ...